Surface sensitivity of the spin Seebeck effect

Abstract

We have investigated the influence of the interface quality on the spin Seebeck effect (SSE) of the bilayer system yttrium iron garnet (YIG) - platinum (Pt). The magnitude and shape of the SSE is strongly influenced by mechanical treatment of the YIG single crystal surface. We observe that the saturation magnetic field H_{sat} for the SSE signal increases from 55.3 mT to 72.8 mT with mechanical treatment. The change in the magnitude of H_{sat} can be attributed to the presence of a perpendicular magnetic anisotropy due to the treatment induced surface strain or shape anisotropy in the Pt/YIG system. Our results show that the SSE is a powerful tool to investigate magnetic anisotropy at the interface.

arXiv comment5 pages, 4 figures

References in corpus (11)

• Spin Caloritronics
• Spin Seebeck insulator
• Theory of magnon-driven spin Seebeck effect
• Theory of the Spin Seebeck Effect
• Spin pumping by parametrically excited exchange magnons
• Observation of the spin Peltier effect
• Spin transfer torque on magnetic insulators
• Spin mixing conductance at a well-controlled platinum/yttrium iron garnet interface
• Platinum thickness dependence of the inverse spin-Hall voltage from spin pumping in a hybrid YIG/Pt system
• Optimization of the yttrium iron garnet/platinum interface for spin pumping-based applications
• Exchange magnetic field torques in YIG/Pt bilayers observed by the spin-Hall magnetoresistance

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